Plug.



ED JUNE 28, i913.

Patented July 11, 1916.

' UNITED sTA'rEs yParnrrr omen.

CHARLES E. GODLEY,-OF DETROIT, MICHIGAN, ASSIGNOR, `BY MESNE ASSIGNMENTS, TO IEDMUNDSV & JONES CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW Yonx. C

To all wko/mJ it may concern: Be it known that I, CHARLES E. GoDLEY,

r a citizen of the United States of America,

ofwhich the following is a speciiication, ref-v erence being had therein to the accompanying drawings.

My invention yrelates to 'plugs for lamp socketsand resides in the provision of a simple and efficient plug, and in certain con structions', arrangements and combinations of parts as will more fully hereinafter appear and as claimed. p

In the drawings, Figure 1 is a perspective view of` a lamp socket provided with a plug embodying the invention; Fig. 2 isa longitudinal, central section therethrough;v and Fig. 3 is a fragmentary perspective Vview through the portion E.

` B designates a plug comprising a' casing C, preferably'av metallic sleeve, and an insulating core D provided with a portion eX- tending within and f fitting'one end of the sleeve C,.and with, another portionIfl ar-k ranged without the sleeve'.

and J the other.` These contacts are carried by the core D and each comprises ashank Kv having head L preferably integral there' with and a terminal or lead-"attachingpor-T tion M having-a threaded engagement with4 a stud N of reducedlcrossfsection on the end of"v vthe 'shank. The shank hasa longitudinal- 'f -Y fslidingengagement with anap'erture` N in the core D andthe lead-'attaching portiongl.

M has- Va p sliding engagement with "any eni larged bore O arranged upon one lside of and alining with the aperture N.y Upon'theop-f posite side of the aperture isa second 'alined bore P of a diameter sufciently larger'than v theshank so as to receive aspring Q coiled around the shank. One end ofjthis spring bears against the head L while'the other is seated upon the base R of the bore P. The .spring however, tends to project the headV L of the Contact forwardly within th'elarnp` bulb engaging portion S of the plug. Forward movement of the contact however, is

limited .by the terminal-engaging portion. contacting with the inner end of the bore O...

Communicating with the bore O is a cham-- F is a pin for attaching the sleevefto the 'f core. 'f 'l' j I designates one of the electrical' contacts Y' through'the chamber T and the aperture W unitary structure.

PLUG.

Patented July ber T that opens out throughvthe peripheryy l of the portion E of the core and throug which the end of thelead or wire U passesy into engagement with the terminal-attaching vportionY M. The latter is preferably in the form of a boX having one end threaded to vengage the threaded stud N and having its opposite end internally threaded to receive a vclamping screw V, while extending through the side of the boX is an aperture W for receiving the wire T. The-head of the clampbore O, and the latter and the boX are prefthe lamp bulb, in'.A the usual manner, the

' springs upon the contacts serving to hold the lamp bulb in place.

' are of course, insulated from each other and also thechambers T for receiving the wires The contacts I and J are separated by a partition Z of-insulating material, this being preferably accomplished by forming the partition integral with the *core D. Y 'Byther structure hereinbefore described, fwhen it is desired to attach 4the wire tol th contact, the end ofthe wire is yinserted ing screw is accessible through the end of the f clamped thereto by means of the screw V.

When the wire is so attached'there isa posi-` tive connection between the wire and the vhead 4ofthe contact, which in effect forms a Therefore, but' a small.' portion ofthe current will pass through the VspringQ, eliminating any tendencv for this` ff springato become overheated and crystal- 'Qlizedj lThe'. chamber -T is suiiiciently elongated to permit the end of the wire -to move V`with the boX during the travel of ythe shank within -the'aperture N` when the lamp bulb is being engaged with the socket, and in all.

positions of longitudinal'movement of the contact it will be noted'that the parts v0i thel 1 L Contact and the wire or lead remain inv fixed y relation. f l y f WhatIclaimlas my invention is 1. In a plug, the combination with a lampbulb engaging portion, of an insulating core operatively connected thereto and provided with an opening extending longitudinally therethrough, a contact member extending through said opening a spring sleeved upon the contact tending to yieldably retain one end ofthe contactwithm -the lamp-bulbengaging portion, and a lead-attaching section lixedly connected tothe contact to move as la unit therewith and constituting a stop to insulating core having ".a'section arranged withinthe sleeve and .'operatively connected thereto, said core being? .provided with an apert-ure land withalining `bores-'upon opposite sides yof: said aperture, la' contact com-, pris'ing a shank slidably engagingl said aperture, a head upon one end 'of the shank projecting within the lamp bulb engaging portion, a' s ring arranged within one of the bores an( sleeved upon the shank, the ends of said springs respectivelyV engaging the base of said bore-and said head, and a leadattaching section arranged withinv and slid# ably engagin'g-the other borepsaid lead-attaching seetioniiicluding a clamping mem- Eer accessible through the last-mentioned ore.

'23. In -a plug, the combination with a sleeve provided with a lampbulb engaging portion,- 'of an nsulatin core having a section arranged within sai( sleeve and provided with' al portion arranged thcrewithont a contact earriedf'by said core having its orward end arranged within said'lamp bulb engaging portion, a'spring exerting a forward pressure on said contact,'as'a whole, a terminal-enga ging section carried by the rear end of said contact and arrangedwithin said core, andl a terminal chamber extending laterally through said core in operative relation to said terminal-engaging section.-

4. In a plug, the combination with asleeve provided with a lamp-bulb engaging portion, of an insulatingcore havin a section arranged within said sleeve an with a portion arranged therewithout, a. springpressed contact carried by 4said core havingr its vforward end arranged within said lamp bulb engaging portion, a termi'- nal-engaging section carried by the core and arranged therewithin, a chamber extending laterally through said core in operative relation to said terminal-enga `ing section, and a clamping member carrier by the terminalengaging section accessible through the end of said core.

In a plug, the combination with a' sleeve having 'a'lamp bulb-engaging portion, of an insulating core having a portion projecting into said sleeve,contact membersextending through said insulating core longitudinally Oppieljot this patent niaybe obtained yim' provided' of the sleeve and having portions projecting into the bulb-engaging portion thereof, terminals arranged within the insulating core exterior tothe sleeve, respectively connected with said contact members, and clamping members accessible through the outer end of the c oreengagingthe terminals, said end being `formed with laterally opening chambers for the engagement of conductors with the terminals.

G. In a plug, the combination with a membcr'farranged to engage alamp bulb'at one extremity, of an insulating member engaged with the other extremity of the bulb-engagingmember, .contact members passing through the insulating member and longitudinally adjustable as a whole relative thereto,-having end portions projecting into the bnlb-engaging member, the insulating member being formed with chambers` into which the other end portions ot' the Contact members respectively project, said chambers opening in t 1e lateral face of the insulating member to admitlead wires.

7. In a plugfthe combinationwith a sleeve having alampbulb engaging portion, of an insulating core having portions interior and exterior to said sleeve. said core having a longitudinal opening and having a laterally opening passage in its exterior portion intersecting vsaid longituc'linal opening, a contact mounted in said longitudinal opening, a. conductor entering said laterally opening passagetoenga e said contact, and a binding screwf accessi le through the outer end of said core engaging said conductor with said contact.

8. -In a' plu the combination with a sleeve provided witi a. lamp bulb engaging portion, of an insulating core having a section arranged within said sleeve and provided with a portion arranged therewithout, a contact carried by said core having its forward end arranged within said lamp bulb engagingportion, a spring exerting a forward ressuref'on said contact, a terminal engagmg section carried by the end of said contact and movable therewith, said insulating core being formed with a chamber extending laterally therethrough to receive lead wires extending to said terminal engaging section, said chamber being roportioned to allow a limited freedom o motion of said lead wires during adjustment of said contact.

In testimony whereof I ailix my signature in presence of two witnesses.

CHARLES E. GODLEY.

Witnesses:

IVM. J. Buurman, Jamas I. Banny.

ave eentl elch; by addressing the Commissioner of Patents, Washington, D. 0.

il i.) 

